The Norby Chronicles has been previously published as two titles, Norby the Mixed-Up Robot, and Norby’s Other Secret.

All the characters and events portrayed in this book are fictitious.

This Ace Science Fiction book contains the complete text of the two original hardcover editions.  It has been reset in a typeface designed for easy reading and was printed from new film.

THE NORBY CHRONICLES

An Ace Science Fiction Book/published by arrangement with Walker and Company

PRINTING HISTORY

Walker and Company editions published 1983, 1984

Ace Science Fiction edition/ April 1986

All rights reserved.

Copyright © 1983, 1984 by Janet and Isaac Asimov.

Cover art by Barclay Shaw

This book may not be reproduced in whole or in part by mimeograph or any other means, without permission.

For information address: Walker and Company,

720 Fifth Avenue, New York, New York 10019

ISBN: 0-441-58633-3

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The Berkley Publishing Group,

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PRINTED IN THE UNITED STATES OF AMERICA